I am putting in a bathroom in my basement and know I need to vent the fan. I plan on running the vent between the joists, but I'll need to jog around the i-beam. is it okay to use flexible dryer-vent type pipe to come down and then back up to get around the structural beam? Essentially it would look lik ~~~~U~~~~~~ where the U is the flexible vent pipe going underneath the beam? Other suggestions?
Thanks,